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rockbox/apps/tree.c
Björn Stenberg 8b1aba8447 Don't lock ourselves in on empty dirs 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@1101 a1c6a512-1295-4272-9138-f99709370657
2002-06-19 20:10:58 +00:00

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C
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 Daniel Stenberg
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdbool.h>
#include "dir.h"
#include "file.h"
#include "lcd.h"
#include "button.h"
#include "kernel.h"
#include "tree.h"
#include "play.h"
#include "main_menu.h"
#include "sprintf.h"
#include "mpeg.h"
#include "playlist.h"
#include "menu.h"
#ifdef HAVE_LCD_BITMAP
#include "icons.h"
#endif
#define MAX_FILES_IN_DIR 200
#define TREE_MAX_FILENAMELEN 128
#define MAX_DIR_LEVELS 10
struct entry {
bool file; /* true if file, false if dir */
char name[TREE_MAX_FILENAMELEN];
};
static struct entry dircache[MAX_FILES_IN_DIR];
static struct entry* dircacheptr[MAX_FILES_IN_DIR];
static int filesindir;
void browse_root(void)
{
dirbrowse("/");
}
#ifdef HAVE_LCD_BITMAP
#define TREE_MAX_ON_SCREEN ((LCD_HEIGHT-MARGIN_Y)/LINE_HEIGTH)
#define TREE_MAX_LEN_DISPLAY 16 /* max length that fits on screen */
#define MARGIN_Y 0 /* Y pixel margin */
#define MARGIN_X 12 /* X pixel margin */
#define LINE_Y 0 /* Y position the entry-list starts at */
#define LINE_X 2 /* X position the entry-list starts at */
#define LINE_HEIGTH 8 /* pixels for each text line */
#define CURSOR_Y 0 /* the cursor is not positioned in regard to
the margins, so this is the amount of lines
we add to the cursor Y position to position
it on a line */
extern unsigned char bitmap_icons_6x8[LastIcon][6];
#else /* HAVE_LCD_BITMAP */
#define TREE_MAX_ON_SCREEN 2
#define TREE_MAX_LEN_DISPLAY 11 /* max length that fits on screen */
#define LINE_Y 0 /* Y position the entry-list starts at */
#define LINE_X 1 /* X position the entry-list starts at */
#define CURSOR_Y 0 /* not really used for players */
#endif /* HAVE_LCD_BITMAP */
#ifdef HAVE_RECORDER_KEYPAD
#define TREE_NEXT BUTTON_DOWN
#define TREE_PREV BUTTON_UP
#define TREE_EXIT BUTTON_LEFT
#define TREE_ENTER BUTTON_RIGHT
#define TREE_MENU BUTTON_F1
#else
#define TREE_NEXT BUTTON_RIGHT
#define TREE_PREV BUTTON_LEFT
#define TREE_EXIT BUTTON_STOP
#define TREE_ENTER BUTTON_PLAY
#define TREE_MENU BUTTON_MENU
#endif /* HAVE_RECORDER_KEYPAD */
static int compare(const void* e1, const void* e2)
{
return strncmp((*(struct entry**)e1)->name, (*(struct entry**)e2)->name,
TREE_MAX_FILENAMELEN);
}
static int showdir(char *path, int start)
{
static char lastdir[256] = {0};
#ifdef HAVE_LCD_BITMAP
int icon_type = 0;
#endif
int i;
/* new dir? cache it */
if (strncmp(path,lastdir,sizeof(lastdir))) {
DIR *dir = opendir(path);
if(!dir)
return -1; /* not a directory */
memset(dircacheptr,0,sizeof(dircacheptr));
for ( i=0; i<MAX_FILES_IN_DIR; i++ ) {
struct dirent *entry = readdir(dir);
if (!entry)
break;
if(entry->d_name[0] == '.') {
/* skip names starting with a dot */
i--;
continue;
}
dircache[i].file = !(entry->attribute & ATTR_DIRECTORY);
strncpy(dircache[i].name,entry->d_name,TREE_MAX_FILENAMELEN);
dircache[i].name[TREE_MAX_FILENAMELEN-1]=0;
dircacheptr[i] = &dircache[i];
}
filesindir = i;
closedir(dir);
strncpy(lastdir,path,sizeof(lastdir));
lastdir[sizeof(lastdir)-1] = 0;
qsort(dircacheptr,filesindir,sizeof(struct entry*),compare);
}
lcd_stop_scroll();
#ifdef HAVE_NEW_CHARCELL_LCD
lcd_double_height(false);
#endif
lcd_clear_display();
#ifdef HAVE_LCD_BITMAP
lcd_setmargins(0,MARGIN_Y);
lcd_setfont(0);
#endif
for ( i=start; i < start+TREE_MAX_ON_SCREEN; i++ ) {
int len;
if ( i >= filesindir )
break;
len = strlen(dircacheptr[i]->name);
#ifdef HAVE_LCD_BITMAP
if ( dircacheptr[i]->file ) {
if(!strcasecmp(&dircacheptr[i]->name[len-4], ".m3u"))
icon_type = Playlist;
else
icon_type=File;
} else
icon_type=Folder;
lcd_bitmap(bitmap_icons_6x8[icon_type],
6, MARGIN_Y+(i-start)*LINE_HEIGTH, 6, 8, true);
#endif
lcd_puts(LINE_X, LINE_Y+i-start, dircacheptr[i]->name);
}
return filesindir;
}
static int numentries=0;
static int dircursor=0;
static int start=0;
static int dirpos[MAX_DIR_LEVELS];
static int cursorpos[MAX_DIR_LEVELS];
static int dirlevel=0;
static int playing = 0;
static char currdir[255];
/* QUICK HACK! this should be handled by the playlist code later */
char* peek_next_track(int type)
{
static char buf[256];
/* next-song only works when playing */
if (!playing)
return NULL;
switch(playing) {
default:
case 1:
/* play-full-dir mode */
/* get next track in dir */
while (dircursor + start + 1 < numentries ) {
if(dircursor+1 < TREE_MAX_ON_SCREEN)
dircursor++;
else
start++;
if ( dircacheptr[dircursor+start]->file &&
dircacheptr[dircursor+start]->name[strlen(dircacheptr[dircursor+start]->name)-1] == '3') {
snprintf(buf,sizeof buf,"%s/%s",
currdir, dircacheptr[dircursor+start]->name );
lcd_clear_display();
lcd_puts(0,0,"<Playing>");
lcd_puts(0,1,"<all files>");
return buf;
}
}
break;
case 2:
/* playlist mode */
return playlist_next(type);
}
return NULL;
}
bool dirbrowse(char *root)
{
char buf[255];
int i;
int button;
memcpy(currdir,root,sizeof(currdir));
numentries = showdir(root, start);
if (numentries == -1)
return -1; /* root is not a directory */
put_cursorxy(0, CURSOR_Y + dircursor, true);
if ( numentries )
lcd_puts_scroll(LINE_X, LINE_Y+dircursor,
dircacheptr[start+dircursor]->name);
lcd_update();
while(1) {
button = button_get(true);
switch(button) {
case TREE_EXIT:
i=strlen(currdir);
if (i>1) {
while (currdir[i-1]!='/')
i--;
strcpy(buf,&currdir[i]);
if (i==1)
currdir[i]=0;
else
currdir[i-1]=0;
dirlevel--;
if ( dirlevel < MAX_DIR_LEVELS ) {
start = dirpos[dirlevel];
dircursor = cursorpos[dirlevel];
}
else
start = dircursor = 0;
numentries = showdir(currdir, start);
put_cursorxy(0, CURSOR_Y + LINE_Y+dircursor, true);
}
else
mpeg_stop();
break;
case TREE_ENTER:
if ( !numentries )
break;
if ((currdir[0]=='/') && (currdir[1]==0)) {
snprintf(buf,sizeof(buf),"%s%s",currdir,
dircacheptr[dircursor+start]->name);
} else {
snprintf(buf,sizeof(buf),"%s/%s",currdir,
dircacheptr[dircursor+start]->name);
}
if (!dircacheptr[dircursor+start]->file) {
memcpy(currdir,buf,sizeof(currdir));
if ( dirlevel < MAX_DIR_LEVELS ) {
dirpos[dirlevel] = start;
cursorpos[dirlevel] = dircursor;
}
dirlevel++;
dircursor=0;
start=0;
} else {
int len=strlen(dircacheptr[dircursor+start]->name);
lcd_stop_scroll();
if((len > 4) &&
!strcasecmp(&dircacheptr[dircursor+start]->name[len-4],
".m3u"))
{
playing = 2;
play_list(currdir, dircacheptr[dircursor+start]->name);
}
else {
playing = 1;
playtune(buf);
playing = 0;
}
}
numentries = showdir(currdir, start);
put_cursorxy(0, CURSOR_Y + LINE_Y+dircursor, true);
break;
case TREE_PREV:
if(dircursor) {
put_cursorxy(0, CURSOR_Y + LINE_Y+dircursor, false);
dircursor--;
put_cursorxy(0, CURSOR_Y + LINE_Y+dircursor, true);
lcd_update();
}
else {
if (start) {
start--;
numentries = showdir(currdir, start);
put_cursorxy(0, CURSOR_Y + LINE_Y+dircursor, true);
}
}
break;
case TREE_NEXT:
if (dircursor + start + 1 < numentries ) {
if(dircursor+1 < TREE_MAX_ON_SCREEN) {
put_cursorxy(0, CURSOR_Y + LINE_Y+dircursor, false);
dircursor++;
put_cursorxy(0, CURSOR_Y + LINE_Y+dircursor, true);
}
else {
start++;
numentries = showdir(currdir, start);
put_cursorxy(0, CURSOR_Y + LINE_Y+dircursor, true);
}
}
break;
case TREE_MENU:
lcd_stop_scroll();
main_menu();
/* restore display */
/* TODO: this is just a copy from BUTTON_STOP, fix it */
lcd_clear_display();
numentries = showdir(currdir, start);
put_cursorxy(0, CURSOR_Y + LINE_Y+dircursor, true);
break;
}
lcd_stop_scroll();
if ( numentries )
lcd_puts_scroll(LINE_X, LINE_Y+dircursor,
dircacheptr[start+dircursor]->name);
lcd_update();
}
return false;
}
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